Example Code for Arduino-I2C Continuous Data Reading

Hardware Preparation

• SEN0667 Fermion: BMP581 Barometric Pressure Sensor × 1
• DFR0654 FireBeetle 2 ESP32-E × 1
• Several Dupont wires

Software Preparation

• Download and install Arduino IDE: Download Link
• Download DFRobot_BMP58X Library: DFRobot_BMP58X Library
• Library Installation Guide: View Installation Tutorial

Wiring Diagram

• Connect the Fermion: BMP581 Barometric Pressure Sensor to ESP32-E as shown in the diagram. The core wiring correspondence is as follows:
  • Sensor Pin "3V3" → ESP32-E 3.3V
  • Sensor Pin "GND" → ESP32-E GND
  • Sensor I2C Pin "SCL" → ESP32-E SCL (default GPIO22)
  • Sensor I2C Pin "SDA" → ESP32-E SDA (default GPIO21)

Other Preparation Work

• Sensor Functional Pad Configuration: I2C 0x47 (default mode, no need to modify the factory configuration)

Sample Code

#include "DFRobot_BMP58X.h"
#define BMP5_COMM_I2C                  
#define CALIBRATE_ABSOLUTE_DIFFERENCE  

const uint8_t ADDR = 0x47;              
DFRobot_BMP58X_I2C bmp58x(&Wire, ADDR); 

void setup() {
  Serial.begin(115200);                 
  
  
  while(!bmp58x.begin()){
    Serial.println("Sensor init fail!");
    delay(1000);
  }
  Serial.println("Sensor init success!");

  // Calibrate absolute difference (modify parameters according to actual local altitude)
  #if defined(CALIBRATE_ABSOLUTE_DIFFERENCE)
    /* Example uses the altitude of 540 meters in Wenjiang District, Chengdu.
       Replace with your local actual altitude when deploying. */
    bmp58x.calibratedAbsoluteDifference(540.0);
  #endif

  // Set measurement mode to Normal mode (periodic data output based on configured ODR)
  bmp58x.setMeasureMode(bmp58x.eNormal);
}

void loop() {
  delay(1000); 

  Serial.print("Temperature: ");
  Serial.print(bmp58x.readTempC());
  Serial.println(" °C");
  
  Serial.print("Atmospheric Pressure: ");
  Serial.print(bmp58x.readPressPa());
  Serial.println(" Pa");
  
  Serial.print("Altitude: ");
  Serial.print(bmp58x.readAltitudeM());
  Serial.println(" m");
  Serial.println("=================================");
}

Result